Author: quozl Date: Fri Dec 14 08:32:27 2012 New Revision: 3496 URL: http://tracker.coreboot.org/trac/openfirmware/changeset/3496
Log: OLPC XO-1.75 XO-4 - fix DCON unfreeze glitch in "test /display", #12394, but needs review; calling screen wake and sleep from /dcon seems ugly.
Modified: dev/olpc/dcon/mmp2dcon.fth
Modified: dev/olpc/dcon/mmp2dcon.fth ============================================================================== --- dev/olpc/dcon/mmp2dcon.fth Fri Dec 14 08:25:26 2012 (r3495) +++ dev/olpc/dcon/mmp2dcon.fth Fri Dec 14 08:32:27 2012 (r3496) @@ -59,6 +59,20 @@ : dcon@ ( reg# -- word ) " reg-w@" $call-parent ; : dcon! ( word reg# -- ) " reg-w!" $call-parent ;
+: mode@ ( -- mode ) 1 dcon@ ; +: mode! ( mode -- ) 1 dcon! ; +: hres! ( hres -- ) 2 dcon! ; \ def: h# 458 d# 1200 +: htotal! ( htotal -- ) 3 dcon! ; \ def: h# 4e8 d# 1256 +: hsync! ( sync -- ) 4 dcon! ; \ def: h# 1808 d# 24,8 +: vres! ( vres -- ) 5 dcon! ; \ def: h# 340 d# 900 +: vtotal! ( htotal -- ) 6 dcon! ; \ def: h# 390 d# 912 +: vsync! ( sync -- ) 7 dcon! ; \ def: h# 403 d# 4,3 +: timeout! ( to -- ) 8 dcon! ; \ def: h# ffff +: scanint! ( si -- ) 9 dcon! ; \ def: h# 0000 + +: scanint-on ( -- ) mode@ h# 100 or mode! ; +: scanint-off ( -- ) mode@ h# 100 invert and mode! ; + : dcon-load ( -- ) dcon-load-gpio# gpio-set ; : dcon-unload ( -- ) dcon-load-gpio# gpio-clr ;
@@ -72,12 +86,30 @@ 1 value vga? \ VGA 0 value color? \ COLOUR
-d# 905 value resumeline \ Configurable; should be set from args - -: wait-output ( -- ) d# 40 ms ; - +d# 850 value resumeline : mark-time ( -- start-time ) get-msecs ; : delta-ms ( start-time -- elapsed-ms ) mark-time swap - ; + +: wait-output ( -- ) + mark-time ( start-time ) + resumeline scanint! setup-dcon-irq scanint-on ( ) + begin ( start-time ) + dcon-irq? if ( start-time ) + setup-dcon-irq ( start-time ) + begin ( start-time ) + dcon-irq? if ( start-time ) + drop scanint-off exit ( ) + then ( start-time ) + dup delta-ms d# 100 > ( start-time ) + until ( start-time ) + then ( start-time ) + dup delta-ms d# 100 > ( start-time reached? ) + until ( start-time ) + drop ( ) + ." Timeout leaving DCON mode" cr ( ) + scanint-off ( ) +; + : wait-dcon-mode ( -- retry? ) mark-time ( start-time ) begin ( start-time ) @@ -103,23 +135,22 @@ dup vga? = if drop exit then ( source ) dup to vga? ( source ) if -\ unblank-display - d# 50 ms - wait-output - dcon-load \ Put the DCON in VGA-refreshed mode - d# 25 ms \ Ensure that that DCON sees the DCONLOAD high -\ display-on + wait-output \ Wait for the DCON to reach the scan line + " wake" $call-screen \ Enable video signal from SoC + d# 5 ms + dcon-load \ Put the DCON in VGA-refreshed mode + d# 25 ms \ Ensure that that DCON sees the DCONLOAD high else has-dcon-ram? if begin ( ) setup-dcon-irq dcon-unload \ Put the DCON in self-refresh mode wait-dcon-mode ( retry? ) - \ display-off ( retry? ) while ( ) \ We got a false ack from the DCON so start over from LOAD state dcon-load d# 25 ms ( ) repeat ( ) + " sleep" $call-screen then then ; @@ -132,16 +163,6 @@ ['] dcon! catch if 2drop bus-reset then ;
-: mode@ ( -- mode ) 1 dcon@ ; -: mode! ( mode -- ) 1 dcon! ; -: hres! ( hres -- ) 2 dcon! ; \ def: h# 458 d# 1200 -: htotal! ( htotal -- ) 3 dcon! ; \ def: h# 4e8 d# 1256 -: hsync! ( sync -- ) 4 dcon! ; \ def: h# 1808 d# 24,8 -: vres! ( vres -- ) 5 dcon! ; \ def: h# 340 d# 900 -: vtotal! ( htotal -- ) 6 dcon! ; \ def: h# 390 d# 912 -: vsync! ( sync -- ) 7 dcon! ; \ def: h# 403 d# 4,3 -: timeout! ( to -- ) 8 dcon! ; \ def: h# ffff -: scanint! ( si -- ) 9 dcon! ; \ def: h# 0000 [ifdef] old-way : dcon-bright! ( level -- ) d# 10 dcon! ; \ def: h# xxxF ' dcon-bright! to bright! @@ -261,6 +282,16 @@ then ;
+[ifdef] notdef +: test-dcon-freeze-glitch + screen-ih remove-output + " gvsr" $call-screen + begin dcon-freeze dcon-unfreeze key? until key drop + screen-ih add-output + page +; +[then] + \ LICENSE_BEGIN \ Copyright (c) 2010 FirmWorks \
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